Swivel harp fixture for electric lamps



May 18, 1937. K. BERGER 2,081,031

SWIVEL HARP FIXTURE FOR ELECTRIC LAMPS Filed March 18, 1935 INVENTOR KORNEL BERGER i 1 ATTORNEY Patented May 18, 1937 UNITED STATES PATENT OFFICE Kornel Berger, New York, N. Y.

Application Marcli 18, 1935, Serial No. 11,583

2 Claims.

This invention relates to new and useful improvements in a swivel harp fixture for electric lamps.

The invention relates particularly to means for fri'ctionally controlling the swivelling of a stud on the frame of an article as mentioned.

In a prior application and Patent No. 1,974,947, I have disclosed means for frictionally controlling the swivelling of the stud on the frame characterized by the contacting of a washer with the frame. This invention contemplates the formation of the washer in such a manner as to better take advantage of the resiliency of the body of the washer tosupplement the frictional contact between the washer and the frame.

More particularly, the invention proposes the use of a washer having diametrically opposite areas thereof bent downwards against the frame in such a manner that the edges of the washer engage the frame with resilient effect for providing the frictional means desired.

A still further object of the invention is the provision of grooves upon the down-turned areas arranged so as to increase the contacting areas of the washer with the frame to increase the frictional resistance between the parts.

Another object of the invention is the construction of an article as mentioned which is simple and durable and which can be manufactured and sold at a reasonable cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. 1 is a side elevational view of a lamp with a lamp shade frame mounted upon a swivel harp fixture constructed according to this invention.

Fig. 2 is an enlarged perspective detailed view of the swivel harp fixture illustrated per se.

Fig. 3 is a side elevational view of the upper portion of Fig. 2 to better illustrate that portion of the device embodying the invention.

Fig. 4 is a side elevational view of Fig. 3 looking in the direction of the line 4-4 of Fig. 3.

Fig. 5 is a view similar to Fig. 4, but illustrating another embodiment of the invention.

Fig. 6 is a side elevational view of Fig. 5 looking in the direction of the arrow 6-6 of Fig. 5.

In Fig. 1 a lamp base ll! is illustrated provided with a lamp socket ll supporting a lamp l2. A harp fixture I3 is mounted upon the lamp and supports a shade frame M. This shade frame is held in position by a spherical shaped nut l5.

The invention particularly relates to a friction means associated with a stud mounted upon the top of the frame l3 for coaction with the nut l5 to hold the lamp shade in position so that the shade may be tilted in one direction or the other direction to variousdegrees. This frictional means comprises a washer ll mounted upon the stud and engaging against a portion of the frame 14. It is the formation of this washer that forms the basis of this invention.

The washer H has diametrically opposite areas Il bent downwards to engage against the frame. The stud I6 is formed with a flange portion H3 against which the washer ll rests. The washer I1 is formed with a central opening through which the lower portion lfi of the stud engages. A section of the frame l4 passes through an open- .ing in the lower portion l6 of the stud. The bent area ll of the washer resiliently engages against the frame in such a manner that the inherent resilient action of the washer is utilized to produce the frictional resistance for holding the stud in various swivelled positions on the frame.

In the form of the invention illustrated in Figs. 5 and 6 the bent areas [1 are formed with grooves l'l adapted to engage against the frame 14 so as to increase the contacting areas between the washer andthe frame. These grooves l'l are formed by bending the material of the washer. More particularly, the base walls of the grooves are-pressed against the top of the frame. With this construction there will be a pressure between the washer and the frame due to the resiliency of the washer in its bent form, and this pressure will be distributed throughout the" contacting areas of the washer and the frame.

While I have illustrated and described the preferred embodiment of my invention it is'to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

frame, and a stud swivelly mounted on a portion of said'frame for supporting said shade, and

means for detachably securing said shade to said stud, means for frictionally controlling the swivelling of said stud, comprising a washer of swivelling of said stud, comprising a washer of resilient 'material rotatably mounted on said frame, said washer being of substantially uniform thickness and having diametrically opposed edge portions bent for frictionally engaging said frame, said edge portions being bent to form grooves in their sides adjacent said frame for increasing the areas of contact between said washer and said frame, whereby said washer resiliently holds said stud relatively rigidwith said frame. 10

KORNEL BERGER. 

